Running Windowed Mode on Mac

[Argh]

In your eqclient.ini find:

WindowedMode=FALSE

and change it to:

WindowedMode=TRUE

Make this change while your game is not running and then launch the game.

If you don't want the game to take up the whole screen while in windowed mode, you can change your resolution in game by going to Options (command + o) > Display > Video Modes and pick a resolution there.